JPH0639209Y2 - Heating steam circulation device - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] This invention uses a latent heat of condensation of steam to heat a gas or a liquid, and the condensed working fluid is generated by a self-propelled method such as a gravity return method. The present invention relates to a heating steam circulating device for returning liquid to a container, and to a heating steam circulating device in which a liquid supply tank for a liquid receiving tank is improved.

[Conventional technology]

Prior art includes, for example, those shown in FIGS. 3 and 4 of the accompanying drawings. That is, as shown in FIG. 3, the steam generator 101 that generates steam by heating with the heater 110 such as a gas burner, and the condensate that generates the steam by the heat exchanger 102 are stored under reflux and opened to the atmosphere. Liquid receiving tank 10
3, a liquid supply tank 105 communicating with the liquid receiving tank 103 through a condensate delivery pipe 104, a float valve V ₀₁ provided at the opening of the condensate delivery pipe 104, and opening / closing by detecting the water level of the liquid supply tank 105. Equipped with an on-off valve V ₀₂ that controls
Equalizing pipe 106 communicating with the upper space 111 of the steam generator 101
A check valve V ₀₃ for preventing back flow from the steam generator 101 and a lower reservoir 112 of the steam generator 101 and a water supply pipe 107 that communicates the lower portion of the liquid supply tank 105 are connected to each other. Heat exchanger
102 is connected by a steam pipe 113, and the heat exchanger 102 and the upper part of the liquid receiving tank 103 are connected by a return liquid pipe 114. The steam generated by the steam generator 101 is heat-exchanged by the steam pipe 113. vessel
It is sent to 102 to heat the gas or liquid by utilizing the latent heat of condensation, and the condensed working liquid generated here is returned to the liquid receiving tank 103 by the return liquid pipe 114, and the upper space 111 of the liquid supplying tank 105.
Also, since steam is sent through the pressure equalizing pipe 106 and the pressure of the steam generator 101 and the liquid supply tank 105 is kept equal, the amount of water in the steam generator 101 that decreases with the generation of steam is supplied from the liquid supply tank 105. It is replenished sequentially through the pipe 107. Then, when the water level in the liquid supply tank 105 reaches the low liquid level a, the water level sensor 115 detects this and closes the on-off valve V ₀₂ of the pressure equalizing pipe 106 to stop the flow of steam into the liquid supply tank 105, When the pressure in the tank 105 decreases due to heat radiation to the outside, the float valve V ₀₁ falls, the condensate delivery pipe 104 is opened and communicated, and the condensate in the receiving tank 103 is supplied through the condensate delivery pipe 104 to the liquid supply tank 105. Flow into. At this time, since the liquid receiving tank 103 is opened to the atmosphere through the atmosphere opening port 116, the condensate delivery pipe 104
Air also flows in through the upper intake opening 117 of the. Liquid supply tank 1
When the water level of 05 reaches the high liquid level b, the float valve V ₀₁ floats up, and the water level sensor 118 detects this and opens the on-off valve V ₀₂ of the pressure equalizing pipe 106 to open the liquid supply tank 105 and the steam generator. The steam from the steam generator 101 is sent to the upper space 111 of the liquid supply tank 105 through the 101, and the float valve V _{01 is connected} to the valve seat 1 by the steam pressure.
19, the condensate delivery pipe 104 is closed to stop the supply of the condensate from the liquid receiving tank 103 to the liquid supply tank 105, and at the same time, the liquid supply tank 105.
From here, the liquid supply to the steam generator 101 is started. Thus, it is possible to continue the continuous operation while returning the condensed working fluid of the steam to the steam generator.

Further, the one shown in FIG. 4 is the air intake opening 11 of FIG.
In place of 7, an air suction pipe 117 ′ equipped with an on-off valve V ₀₄ is separately provided to separate the condensate in the liquid receiving tank 103, and the upper space 103a of the liquid receiving tank 103 and the upper space 111 of the liquid supplying tank 105 are separated. Is connected to and cut off from each other, and instead of the atmosphere opening port 116 of the liquid receiving tank 103, the upper end of another atmosphere opening pipe 116 'is opened upright above the upper water level of the liquid receiving tank 103. The lower end is communicated with the drain plug V ₀₅ provided in the drain pipe 122 of the liquid receiving tank 103, and further, the air suction pipe 117 ′.
And the return pipe 114 from the heat exchanger 102 to the upper space 1 of the receiving tank 103
The air suction pipe 117 ′, the return liquid pipe 114, and the atmosphere opening pipe 11 are made to face the upper part of the separated liquid 121 having the drain hole 120 built in 03a.
The 6's are not in direct communication with each other to prevent heat loss. Then, the water level in the liquid supply tank 105 reaches the low liquid level a and the liquid receiving tank 1
When the condensate is supplied from 03 to the liquid supply tank 105, the opening / closing valve V ₀₂ of the equalizing pipe 106 is closed at the same time as the opening / closing valve V ₀₄ of the air suction pipe 117 ′ is opened by the command from the water level sensor 115, and the supply is performed. Liquid tank
The vapor in the upper space 111 of 105 rapidly escapes to the liquid receiving tank 103 and becomes atmospheric pressure, the float valve V ₀₁ falls, the condensate delivery pipe 104 is opened and communicated, and the condensate in the liquid receiving tank 103 is condensate delivery pipe 104. The air in the liquid receiving tank 103 is rapidly replenished through the air suction pipe 117 ', and the operation can be continued.
Since they are the same as those shown in the figure, the same parts are designated by the same reference numerals and the description thereof is omitted.

[Problems to be solved by the invention]

In both of FIGS. 3 and 4, the equalizing pipe 106 is used.
Since the steam from is sent to the upper space 111 of the liquid supply tank 105,
Since it is directly sprayed on the liquid surface, the vapor is rapidly cooled by the liquid, which causes the noise of "burrari", which is inconvenient, and the liquid supply tank 105 is located directly below the liquid receiving tank 103. Since the upper and lower sides are overlapped with each other, the whole height is inevitably increased, and since the liquid receiving tank 103 and the steam generator 101 also have a significant step, the device becomes large. Further, since the distance between the low liquid level a and the high liquid level b of the water supply tank 105 is wide, the water level change of the steam generator 101 also becomes large.

Therefore, in this invention, one side of the liquid supply tank 5 is expanded and the upper space between the liquid supply tank 3 and the liquid reception tank 3 is narrowed so that the upper part of the one side is extended and overlapped with the liquid reception tank 3 to provide a replenishment tank portion, A pressure equalizing pipe 6 for sending steam is provided to eliminate noise in the liquid supply tank,
It is intended to provide a heating steam circulation device capable of reducing the overall height.

[Means for solving problems]

This invention uses a steam generator 1 that generates steam by heating with a heater 10 such as a gas burner, and sends the steam from the steam generator 1 to a heat exchanger 2 through a steam pipe 13 to utilize latent heat of condensation of the steam. Heating a gas or liquid and returning the condensate to a return pipe
The liquid receiving tank 3 which is stored in reflux by 14 and whose lower end is connected to the drain plug V ₅ provided in the drain pipe 22 of the liquid receiving tank 3 is opened to the atmosphere by the atmosphere opening pipe 16, and the liquid receiving tank 3 and the condensate delivery The liquid supply tank 5 provided with the liquid supply tank 5 communicating with the liquid supply tank 5 and the opening / closing valve V ₄ which opens and closes by detecting the low liquid level a and the high liquid level b of the liquid supply tank 5 by the water level sensors 15 and 18 Upper space 11 and upper space of receiving tank 3
The air intake pipe 17 communicating with 3a, the float valve V ₁ provided at the opening of the condensate delivery pipe 4, the low liquid level a and the high liquid level b of the liquid supply tank 5.
Equipped with an on-off valve V ₂ that opens and closes by detecting the water level sensors 15 and 18, and includes a pipe draw part 8 of the steam generator 1 and a check valve V ₃ that blocks a reverse flow from the steam generator 1. In the heating steam circulation device including the lower reservoir 12 of the vessel 1 and the water supply pipe 7 that communicates the lower portion of the liquid supply tank 5, one side of the liquid supply tank 5 is expanded to supply the liquid supply tank 5 to the liquid receiving tank 3. The lower space 11 has a lower height, and a replenishment tank portion 5a which overlaps with the liquid receiving tank 3 is formed on one upper side thereof, and the equalizing pipe 6 is connected to the replenishment tank portion 5a. Means are taken to solve the above problems.

[Action]

In the above configuration, the steam generated by the steam generator 1 is sent to the heat exchanger 2 via the steam pipe 13 and also to the replenishment tank portion 5a via the pressure equalizing pipe 6, and the upper space of the liquid supply tank 5 is supplied.
Sent to 11. At this time, the on-off valve V ₂ provided in the pressure equalizing pipe 6 is in the open state when the liquid level in the liquid supply tank 5 is between the high liquid level b or between the high liquid level b and the low liquid level a, and the air intake is performed. The on-off valve V ₄ provided in the pipe 17 is in the closed state. In the heat exchanger 2, the latent heat of condensation is used to heat the gas or liquid, and the condensed working liquid generated here is returned by the return pipe 14 to the receiving tank 3
And is stored in the liquid receiving tank 3. On the other hand, since the vapor pressure also acts on the upper space 11 of the liquid supply tank 5 through the pressure equalizing pipe 6, the steam generator 1 and the liquid supply tank 5 are kept at the same pressure, and the atmosphere open pipe
A steam generator in which the float valve V ₁ is reduced by steam generation under the condition that the float valve V ₁ is lifted and closed by the pressure difference between the liquid receiving tank 3 and the liquid supply tank 5 which are open to the atmosphere via 16 The water amount of 1 is automatically and sequentially replenished from the liquid supply tank 5 through the water supply pipe 7. When the liquid level in the liquid supply tank 5 reaches the low liquid level a, the water level sensor 15 detects this and closes the on-off valve V ₂ of the pressure equalizing pipe 6 and at the same time opens the on-off valve V ₄ of the air suction pipe 17 to supply the water. Liquid tank 5
Steam in the upper space 11 is released through the air release tube 16 rapidly escapes through the air intake pipe 17 into the upper space 3a of the liquid receiving tank 3 to the air supply tank 5 is the float valve V ₁ from the atmospheric pressure Falls by its own weight, the condensate delivery pipe 4 is opened and communicated, and the condensate in the liquid receiving tank 3 flows into the liquid supply tank 5 through the condensate delivery pipe 4. At this time, the air in the liquid receiving tank 3 is rapidly replenished through the air suction pipe 17 and the proper operation can be continued.

When the liquid level in the liquid supply tank 5 reaches the high liquid level b, the float valve V ₁ floats up, and the water level sensor 18 detects this and opens the on-off valve V ₂ of the pressure equalizing pipe 6 to suck air. In order to close the on-off valve V ₄ of the pipe 17, the replenishment tank portion 5a of the liquid supply tank 5 and the steam generator 1 are connected by the pressure equalizing pipe 6, and the steam from the steam generator 1 is supplied to the liquid supply tank 5 again. The tank 5 and the steam generator 1 are kept at the same pressure, the float valve V ₁ is brought into pressure contact with the valve seat 19, and the condensate delivery pipe 4
Is closed to stop the supply of the condensed liquid from the liquid receiving tank 3 to the liquid supply tank 5, and at the same time, the replenishment of water from the liquid supply tank 5 to the steam generator 1 is continued. Thus, the condensed working fluid of the vapor, ie,
It is possible to continue the continuous operation while returning the condensate to the steam generator 1.

In the above heating steam circulation device, the steam of the steam generator is sent to the replenishment tank part 5a above the liquid supply tank 5, so that the steam does not directly contact the liquid surface of the liquid supply tank 5 It is possible to prevent the noise in the liquid supply tank from being rapidly cooled by, and also to expand the one side of the liquid supply tank 5 and provide the replenishment tank portion 5a on the upper part to reduce the height of the upper space of the liquid supply tank. You can
Therefore, the overall height is reduced, the size of the device can be reduced, and the water level change of the steam generator 1 is reduced because the interval between the high and low liquid levels of the liquid supply tank 5 is narrowed.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

First Embodiment FIG. 1 is a principle explanatory view showing an embodiment of a heating steam circulation device according to the present invention, in which 1 is a steam generator for generating steam, and a header part 8 at the top, that is, a header 8 The lower reservoir 12 and the lower reservoir 12 are connected by a large number of heat absorbing tubes 1b having heat absorbing fins 1a, and a through-flow boiler that generates steam by heating this with a heater 10 such as a gas burner is used. 9
Is a vacuum breaker provided in the pipe pulling portion 8 of the steam generator 1 and prevents the inside of the steam generator 1 from being negative pressure by sucking the atmosphere when the set pressure becomes equal to or lower than the atmospheric pressure to prevent excessive water supply. It is for. Reference numeral 2 denotes a heat exchanger, which gives vapor or latent heat of condensation of vapor to a liquid, and is used for boiling water, for example. The heat exchanger 2 is connected to a steam pipe 13 taken out from the pipe pulling portion 8 of the steam generator 1 so that the steam generated in the steam generator 1 is sent to the heat exchanger 2. Three
Is a liquid receiving tank, which is formed in a flat and oblong shape, is connected to the heat exchanger 2 through the return liquid pipe 14, and the condensate produced in the heat exchanger 2 passes through the return liquid pipe 14 and receives the liquid receiving tank 3 And the upper end of an atmosphere open pipe 16 communicating with the drain plug V ₅ provided in the drain pipe 22 from the liquid receiving tank 3 is connected to the upper end of the liquid receiving tank 3. The liquid receiving tank 3 is opened to the atmosphere by opening above the water level c. Reference numeral 4 denotes a condensate delivery pipe vertically provided on the lower part of one side of the liquid receiving tank 3, the upper end of which is an opening 4a in the liquid receiving tank 3 and the lower end is an opening 4b in a liquid supplying tank 5 which will be described later. The liquid supply tank 5 is connected to the condensate delivery pipe 4. V ₁ is a float valve installed near the lower opening 4b of the condensate delivery pipe 4 and moves up and down according to the liquid level and internal pressure in the liquid supply tank 5 to contact and separate from the valve seat 19 to deliver the condensate Open and close the pipe 4 to receive the liquid from the receiving tank 3
It supplies and shuts off the condensate. 5 is a liquid supply tank,
It is expanded to one side and the upper part of the one side is overlapped with the one side of the liquid receiving tank 3 so that a replenishing tank portion 5a juxtaposed with the liquid receiving tank 3 is formed on the upper portion of the liquid supplying tank 5 and at the lower portion thereof. Is a low liquid level a
Is equipped with a water level sensor 15 for detecting the high level b and a water level sensor 18 for detecting the high level b, and the height of the upper space 11 thereof is lowered, and the bottom is brought close to the low liquid level a, and the upper space is communicated with the replenishment tank part 5a. Then, the replenishment tank portion 5a and the pipe pulling portion 8 of the steam generator 1 are connected by the pressure equalizing pipe 6, and the water level sensors 15, 18 are connected to the pressure equalizing pipe 6.
An on-off valve, for example, a solenoid valve V ₂ is provided which is connected to the solenoid valve V ₂ . Further, the upper space 11 of the liquid supply tank 5 and the upper space 3a of the liquid receiving tank 3 are communicated with each other by an air intake pipe 17, and the air intake pipe 17 is connected with the water level sensors 15 and 18 to open and close the valve. For example, a solenoid valve V ₄ is provided, and when the liquid level in the liquid supply tank 5 reaches a predetermined low liquid level a, a water level sensor 15 detects this and the solenoid valve V ₂ of the pressure equalizing pipe 6 is detected by the detection signal. Simultaneously with closing, the solenoid valve V ₄ of the air suction pipe 17 is opened, and when the liquid level in the liquid supply tank 5 reaches a predetermined high liquid level b, this is detected.
The electromagnetic valve V ₂ of the pressure equalizing pipe 6 is opened and the electromagnetic valve V ₄ of the air suction pipe 17 is closed according to the detection signal of 18. Furthermore, the air suction pipe 17 and the return liquid pipe 14 from the heat exchanger 2
Is exposed to the upper part of the separation plate 21 having the drain hole 20 installed in the upper space 3a of the liquid receiving tank 3 so that the air suction pipe 17 and the return liquid pipe 14 and the atmosphere open pipe 16 are not directly connected to each other, and the heat loss is lost. Is preventing. Reference numeral 7 is a water supply pipe that connects the lower reservoir 12 of the steam generator 1 and the lower portion of the liquid supply tank 5 to each other. The water supply pipe 7 is provided with a check valve V ₃ for preventing backflow from the steam generator 1. The amount of water in the steam generator 1 that decreases with steam generation is automatically replenished from the liquid supply tank 5 via the water supply pipe 7.

Second Embodiment FIG. 2 is a schematic configuration diagram showing a different embodiment of the heating steam circulation device according to the present invention, in which a heat exchanger (not shown) is provided from the steam generator 1 through a gas-liquid separator 23. And the liquid supply tank 5, the pressure of the steam generator 1 is provided in the middle of the blow pipe 24 that is taken out from the bottom of the gas-liquid separator 23 and intersects with the water supply pipe 7. Exhaust passage
26 is provided with an exhaust temperature detection sensor 27 and a safety means is provided to stop combustion when any of the above sensors 25 or 27 reaches a set limit value or more, and as the heater 10, a forced air supply type porous ceramic burner. For air supply fan F
The gas supply nozzle 30 is faced to the outlet of the tank, and the water purifier 29 is provided in the water supply pipe 28 to the liquid receiving tank 3. The structure is different from that of the first embodiment. The reference numerals are given and the description thereof is omitted.

Next, the operation of the above embodiment will be described.

When the liquid level in the liquid supply tank 5 is between the high liquid level b or between the high liquid level b and the low liquid level a, the solenoid valve V ₂ of the pressure equalizing pipe 6 is in the open state,
Since the solenoid valve V ₄ of the air intake pipe 17 is closed, the heater 10
The steam generated from the steam generator 1 by heating the endothermic tube 1b by the is sent under pressure to the heat exchanger 2 via the steam tube 13, and
It is sent to the replenishment tank portion 5a through the pressure equalizing pipe 6 and is pressure-fed to the upper space 11 of the liquid supply tank 5. Then, in the heat exchanger 2, the vapor or condensate of vapor is applied to the gas or fluid flowing through the heat exchanger 2 to perform boiling water, for example. Thus, the liquid is returned to the liquid receiving tank 3 and stored in the liquid receiving tank 3. On the other hand, since the vapor pressure is also acting on the upper space 11 of the liquid supply tank 5, the vapor generator 1 and the liquid supply tank 5 are kept at a uniform pressure, and this pressure releases the atmosphere to the atmosphere via the atmosphere open pipe 16. A differential pressure is generated between the liquid receiving tank 3 and the liquid supplying tank 5, and the float valve V ₁ is brought into pressure contact with its valve seat 19 and the condensate delivery pipe 4 is closed. The water amount (water level) of the steam generator 1 that decreases (decreases) is automatically and sequentially replenished from the liquid supply tank 5 via the water supply pipe 7, and is constantly maintained at a constant amount (constant water level). The liquid level in the liquid supply tank 5 gradually decreases as the steam generator 1 continues to operate, and when the liquid level reaches a predetermined low liquid level a, a water level sensor 15 provided at that position is provided.
Detects this, and the detection signal closes the solenoid valve V ₂ of the pressure equalizing pipe 6 and opens the solenoid valve V ₄ of the air suction pipe 17. Then, since the pressure feed of the steam to the upper space 11 of the liquid supply tank 5 is stopped, the pressure in the liquid supply tank 5 is reduced and at the time when the pressure in the liquid reception tank 3 becomes equal to the water head pressure + the float valve. Since the lifting force of V ₁ is released, the float valve V ₁ falls by its own weight and the valve seat 19
The condensate delivery pipe 4 is opened apart from the condensate, and the condensate stored in the liquid receiving tank 3 is stored in the upper opening 4a of the condensate delivery pipe 4 → valve seat.
19 → flows into the liquid supply tank 5 through the lower opening 4b. On this occasion,
Since the liquid receiving tank 3 is opened to the atmosphere by the atmosphere open pipe 16, the reflux operation is smoothly performed.

In this way, the stored condensate in the liquid receiving tank 3 is supplied into the liquid supply tank 5 through the condensate delivery pipe 4, and when the liquid level reaches a predetermined high liquid level b, the float valve V ₁ floats due to the liquid level and comes into contact with the valve seat 19, and the water level sensor 18 provided at this position detects this and the pressure equalizing pipe 6
Open the solenoid valve V ₂ is closed the solenoid valve V ₄ of the air intake pipe 17, the liquid supply tank 5 and the steam generator 1 in the upper space 11 again pumping steam from the steam generator 1 of the liquid supply tank 5 With or without equalizing pressure, the float valve V ₁ is pressed against the valve seat 19 to close the condensate delivery pipe 4 to stop the supply of the condensate from the liquid receiving tank 3 to the liquid supplying tank 5 and at the same time to supply the liquid supplying tank 5 To start the liquid supply by the automatic replenishment to the steam generator 1 to maintain the water level of the steam generator 1 at a constant water level.

By the series of operations described above, the working fluid in which the vapor is condensed is allowed to flow back to the steam generator by itself, and continuous operation can be continued. However, the flat horizontally long liquid receiving tank 3 is provided on one side of the upper portion of the liquid supplying tank 5. One side is overlapped, and a replenishing tank portion 5a is formed on the other side of the upper portion of the liquid feeding tank 5 so as to be juxtaposed with the liquid receiving tank 3 so that they can be installed at substantially the same height as the steam generator 1.

[Effect of device]

As described above, in the present invention, in the heating steam circulation device for returning the condensed working fluid of the steam to the steam generator by itself, the replenishing tank portion 5a which is placed in parallel with the liquid receiving tank 3 in a part of the liquid feeding tank 5. And the pressure equalizing pipe 6 was connected to the replenishment tank portion 5a, so that the vapor was sent to the replenishment tank portion 5a above the liquid supply tank, so that the vapor blows directly onto the liquid surface of the liquid supply tank 5. It can be prevented from being attached, so that the generation of noise in the liquid supply tank can be eliminated.

In addition, since one side of the liquid supply tank 5 is expanded so that the upper replenishment tank portion 5a overlaps the liquid reception tank 3, the height of the upper space of the liquid supply tank 5 can be reduced, and the liquid reception tank 3 and the liquid supply tank 3 Since the height of the entire device including the tank 5 can be significantly reduced, the device can be made compact.

Furthermore, since the liquid supply tank 5 is expanded, the low liquid level a of the liquid supply tank 5 can be set to a high position, and there is an effect that the water level change of the steam generator 1 can be reduced.

[Brief description of drawings]

FIG. 1 is a principle explanatory view showing an embodiment of a heating steam circulation device according to the present invention, FIG. 2 is a schematic configuration diagram of a different embodiment, and FIGS. 3 and 4 are explanatory views of a conventional example. 1 ... steam generator, 2 ... heat exchanger, 3 ... receiver tank, 4 ... condensate delivery tube, 5 ... liquid supply tank, V ₁ ... float valve, V ₂ ... off valve,
6 ... Pressure equalizing pipe, V ₃ ... Check valve, 7 ... Water supply pipe, 5a ... Replenishment tank section.

Claims (1)

[Scope of utility model registration request] 1. A steam generator (1) for generating steam, a liquid receiving tank (3) for storing a return liquid of a condensate generated by the heat exchanger (2) for storing the steam, and the receiving tank (3). A liquid supply tank (5) communicating with the liquid tank (3) by a condensate delivery pipe (4), and a float valve (V ₁ ) provided at the opening of the condensate delivery pipe (4)
And a pressure equalizing pipe (6) having an on-off valve (V ₂ ) that opens and closes by detecting the water level of the liquid supply tank (5) and connects the upper part of the steam generator (1) and the upper part of the liquid supply tank (5), Steam generator (1) equipped with a check valve (V ₃ ) that blocks the reverse flow from the generator (1)
In the heating vapor circulation device comprising a water supply pipe (7) communicating between the lower part of the tank and the lower part of the liquid supply tank (5), the liquid supply tank (5)
One side is expanded to lower the height of the upper space (11) of the liquid supply tank (5) with respect to the liquid receiving tank (3), and the upper side of the one side is overlapped with the liquid receiving tank (3). A heating vapor circulation device in which a replenishment tank section (5a) is formed and the pressure equalizing pipe (6) is connected to the replenishment tank section (5a).